76244-77-4Relevant academic research and scientific papers
6H-Benzo[c]chromen-6-one derivatives as selective ERβ agonists
Sun, Wanying,Cama, Lovji D.,Birzin, Elizabeth T.,Warrier, Sudha,Locco, Louis,Mosley, Ralph,Hammond, Milton L.,Rohrer, Susan P.
, p. 1468 - 1472 (2006)
A series of 6H-benzo[c]chromen-6-one and 6H-benzo[c]chromene derivatives were prepared, and the affinity and selectivity for ERα and ERβ was measured. Many of the analogs were found to be potent and selective ERβ agonists. Bis hydroxyl at positions 3 and 8 is essential for activity in a HTRF coactivator recruitment assay. Additional modifications at both phenyl rings led to compounds with ERβ 100-fold selectivity over ERα.
Color-tunable fluorescent dyes based on benzo[c]coumarin
Krzeszewski, Maciej,Vakuliuk, Olena,Gryko, Daniel T.
, p. 5631 - 5644 (2013/09/12)
Hurtley condensation was shown to be a perfect tool with which to assemble a diversified library of derivatives of benzo[c]coumarin. Not only do simple resorcinols and ortho-bromobenzoic acids undergo this reaction, but also dihydroxynaphthalenes and 3-bromothiophene-2-carboxylic acid, affording the desired compounds in moderate yields. In the case of naphthalenediols, intriguing regioselectivity is observed, which holds promise for its utilization in the synthesis of previously inaccessible molecules. Further transformation made it possible to obtain benzo[c]coumarin bearing amino and nitro groups at various positions, which served as entry points to prepare complex hybrids of 1,4-benzoxazin-2-ones and benzo[c]coumarins. The hydroxyl group proved to be the synthetic handle, enabling the synthesis of strongly solvatochromic, soluble analogues. The effect of structural variation on photophysical properties was studied in detail for almost 30 compounds. The relationship between the structure and photophysical properties was thoroughly elucidated by comparison with simple analogues (coumarins, benzoxazinones). All of the obtained compounds exhibit moderate to large Stokes shifts (3300-12500 cm-1). The type of π-expansion of the chromophore strongly influences the overall optical phenomena. Compounds possessing alkyl substituents on the benzo[c]coumarin core have much higher fluorescence quantum yields than their analogues bearing amino, fluorine, and other complex substituents. Interestingly, the product possessing a fused coumarin-thiophene skeleton exhibits over twofold higher fluorescence quantum yield than any of its coumarin-benzene analogues. By using either substituted 2-bromobenzoic acids and electron-rich phenols or postfunctionalization of the products of Hurtley condensation, it is possible to access a range of multisubstituted benzo[c]coumarins. Tunable fluorescence quantum yield and solvatochromism, combined with large Stokes shifts, make them good platforms for emission-oriented applications. Copyright
Modified coumarins. 6. Synthesis of substituted 5,6-benzopsoralens
Garazd,Ogorodniichuk,Garazd,Khilya
, p. 424 - 433 (2007/10/03)
Substituted 5H-benzo[c]furo[3,2-g]chromen-5-ones, modified analogs of psoralen that contain a benzene ring annelated at the 5,6-position of a furo[3,2-g]chromen-7-one system, were synthesized from 3-hydroxy-6H-benzo[c] chromen-6-ones.
